| /* |
| * Copyright (C) STMicroelectronics SA 2014 |
| * Authors: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics. |
| * License terms: GNU General Public License (GPL), version 2 |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/slab.h> |
| |
| #include <media/v4l2-event.h> |
| #include <media/v4l2-ioctl.h> |
| |
| #include "bdisp.h" |
| |
| #define BDISP_MAX_CTRL_NUM 10 |
| |
| #define BDISP_WORK_TIMEOUT ((100 * HZ) / 1000) |
| |
| /* User configuration change */ |
| #define BDISP_PARAMS BIT(0) /* Config updated */ |
| #define BDISP_SRC_FMT BIT(1) /* Source set */ |
| #define BDISP_DST_FMT BIT(2) /* Destination set */ |
| #define BDISP_CTX_STOP_REQ BIT(3) /* Stop request */ |
| #define BDISP_CTX_ABORT BIT(4) /* Abort while device run */ |
| |
| #define BDISP_MIN_W 1 |
| #define BDISP_MAX_W 8191 |
| #define BDISP_MIN_H 1 |
| #define BDISP_MAX_H 8191 |
| |
| #define fh_to_ctx(__fh) container_of(__fh, struct bdisp_ctx, fh) |
| |
| enum bdisp_dev_flags { |
| ST_M2M_OPEN, /* Driver opened */ |
| ST_M2M_RUNNING, /* HW device running */ |
| ST_M2M_SUSPENDED, /* Driver suspended */ |
| ST_M2M_SUSPENDING, /* Driver being suspended */ |
| }; |
| |
| static const struct bdisp_fmt bdisp_formats[] = { |
| /* ARGB888. [31:0] A:R:G:B 8:8:8:8 little endian */ |
| { |
| .pixelformat = V4L2_PIX_FMT_ABGR32, /* is actually ARGB */ |
| .nb_planes = 1, |
| .bpp = 32, |
| .bpp_plane0 = 32, |
| .w_align = 1, |
| .h_align = 1 |
| }, |
| /* XRGB888. [31:0] x:R:G:B 8:8:8:8 little endian */ |
| { |
| .pixelformat = V4L2_PIX_FMT_XBGR32, /* is actually xRGB */ |
| .nb_planes = 1, |
| .bpp = 32, |
| .bpp_plane0 = 32, |
| .w_align = 1, |
| .h_align = 1 |
| }, |
| /* RGB565. [15:0] R:G:B 5:6:5 little endian */ |
| { |
| .pixelformat = V4L2_PIX_FMT_RGB565, |
| .nb_planes = 1, |
| .bpp = 16, |
| .bpp_plane0 = 16, |
| .w_align = 1, |
| .h_align = 1 |
| }, |
| /* NV12. YUV420SP - 1 plane for Y + 1 plane for (CbCr) */ |
| { |
| .pixelformat = V4L2_PIX_FMT_NV12, |
| .nb_planes = 2, |
| .bpp = 12, |
| .bpp_plane0 = 8, |
| .w_align = 2, |
| .h_align = 2 |
| }, |
| /* RGB888. [23:0] B:G:R 8:8:8 little endian */ |
| { |
| .pixelformat = V4L2_PIX_FMT_RGB24, |
| .nb_planes = 1, |
| .bpp = 24, |
| .bpp_plane0 = 24, |
| .w_align = 1, |
| .h_align = 1 |
| }, |
| /* YU12. YUV420P - 1 plane for Y + 1 plane for Cb + 1 plane for Cr |
| * To keep as the LAST element of this table (no support on capture) |
| */ |
| { |
| .pixelformat = V4L2_PIX_FMT_YUV420, |
| .nb_planes = 3, |
| .bpp = 12, |
| .bpp_plane0 = 8, |
| .w_align = 2, |
| .h_align = 2 |
| } |
| }; |
| |
| /* Default format : HD ARGB32*/ |
| #define BDISP_DEF_WIDTH 1920 |
| #define BDISP_DEF_HEIGHT 1080 |
| |
| static const struct bdisp_frame bdisp_dflt_fmt = { |
| .width = BDISP_DEF_WIDTH, |
| .height = BDISP_DEF_HEIGHT, |
| .fmt = &bdisp_formats[0], |
| .field = V4L2_FIELD_NONE, |
| .bytesperline = BDISP_DEF_WIDTH * 4, |
| .sizeimage = BDISP_DEF_WIDTH * BDISP_DEF_HEIGHT * 4, |
| .colorspace = V4L2_COLORSPACE_REC709, |
| .crop = {0, 0, BDISP_DEF_WIDTH, BDISP_DEF_HEIGHT}, |
| .paddr = {0, 0, 0, 0} |
| }; |
| |
| static inline void bdisp_ctx_state_lock_set(u32 state, struct bdisp_ctx *ctx) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ctx->bdisp_dev->slock, flags); |
| ctx->state |= state; |
| spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags); |
| } |
| |
| static inline void bdisp_ctx_state_lock_clear(u32 state, struct bdisp_ctx *ctx) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ctx->bdisp_dev->slock, flags); |
| ctx->state &= ~state; |
| spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags); |
| } |
| |
| static inline bool bdisp_ctx_state_is_set(u32 mask, struct bdisp_ctx *ctx) |
| { |
| unsigned long flags; |
| bool ret; |
| |
| spin_lock_irqsave(&ctx->bdisp_dev->slock, flags); |
| ret = (ctx->state & mask) == mask; |
| spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags); |
| |
| return ret; |
| } |
| |
| static const struct bdisp_fmt *bdisp_find_fmt(u32 pixelformat) |
| { |
| const struct bdisp_fmt *fmt; |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(bdisp_formats); i++) { |
| fmt = &bdisp_formats[i]; |
| if (fmt->pixelformat == pixelformat) |
| return fmt; |
| } |
| |
| return NULL; |
| } |
| |
| static struct bdisp_frame *ctx_get_frame(struct bdisp_ctx *ctx, |
| enum v4l2_buf_type type) |
| { |
| switch (type) { |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| return &ctx->src; |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
| return &ctx->dst; |
| default: |
| dev_err(ctx->bdisp_dev->dev, |
| "Wrong buffer/video queue type (%d)\n", type); |
| break; |
| } |
| |
| return ERR_PTR(-EINVAL); |
| } |
| |
| static void bdisp_job_finish(struct bdisp_ctx *ctx, int vb_state) |
| { |
| struct vb2_v4l2_buffer *src_vb, *dst_vb; |
| |
| if (WARN(!ctx || !ctx->fh.m2m_ctx, "Null hardware context\n")) |
| return; |
| |
| dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__); |
| |
| src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); |
| dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); |
| |
| if (src_vb && dst_vb) { |
| dst_vb->timestamp = src_vb->timestamp; |
| dst_vb->timecode = src_vb->timecode; |
| dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK; |
| dst_vb->flags |= src_vb->flags & |
| V4L2_BUF_FLAG_TSTAMP_SRC_MASK; |
| |
| v4l2_m2m_buf_done(src_vb, vb_state); |
| v4l2_m2m_buf_done(dst_vb, vb_state); |
| |
| v4l2_m2m_job_finish(ctx->bdisp_dev->m2m.m2m_dev, |
| ctx->fh.m2m_ctx); |
| } |
| } |
| |
| static int bdisp_ctx_stop_req(struct bdisp_ctx *ctx) |
| { |
| struct bdisp_ctx *curr_ctx; |
| struct bdisp_dev *bdisp = ctx->bdisp_dev; |
| int ret; |
| |
| dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__); |
| |
| cancel_delayed_work(&bdisp->timeout_work); |
| |
| curr_ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev); |
| if (!test_bit(ST_M2M_RUNNING, &bdisp->state) || (curr_ctx != ctx)) |
| return 0; |
| |
| bdisp_ctx_state_lock_set(BDISP_CTX_STOP_REQ, ctx); |
| |
| ret = wait_event_timeout(bdisp->irq_queue, |
| !bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx), |
| BDISP_WORK_TIMEOUT); |
| |
| if (!ret) { |
| dev_err(ctx->bdisp_dev->dev, "%s IRQ timeout\n", __func__); |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| } |
| |
| static void __bdisp_job_abort(struct bdisp_ctx *ctx) |
| { |
| int ret; |
| |
| ret = bdisp_ctx_stop_req(ctx); |
| if ((ret == -ETIMEDOUT) || (ctx->state & BDISP_CTX_ABORT)) { |
| bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ | BDISP_CTX_ABORT, |
| ctx); |
| bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR); |
| } |
| } |
| |
| static void bdisp_job_abort(void *priv) |
| { |
| __bdisp_job_abort((struct bdisp_ctx *)priv); |
| } |
| |
| static int bdisp_get_addr(struct bdisp_ctx *ctx, struct vb2_buffer *vb, |
| struct bdisp_frame *frame, dma_addr_t *paddr) |
| { |
| if (!vb || !frame) |
| return -EINVAL; |
| |
| paddr[0] = vb2_dma_contig_plane_dma_addr(vb, 0); |
| |
| if (frame->fmt->nb_planes > 1) |
| /* UV (NV12) or U (420P) */ |
| paddr[1] = (dma_addr_t)(paddr[0] + |
| frame->bytesperline * frame->height); |
| |
| if (frame->fmt->nb_planes > 2) |
| /* V (420P) */ |
| paddr[2] = (dma_addr_t)(paddr[1] + |
| (frame->bytesperline * frame->height) / 4); |
| |
| if (frame->fmt->nb_planes > 3) |
| dev_dbg(ctx->bdisp_dev->dev, "ignoring some planes\n"); |
| |
| dev_dbg(ctx->bdisp_dev->dev, |
| "%s plane[0]=%pad plane[1]=%pad plane[2]=%pad\n", |
| __func__, &paddr[0], &paddr[1], &paddr[2]); |
| |
| return 0; |
| } |
| |
| static int bdisp_get_bufs(struct bdisp_ctx *ctx) |
| { |
| struct bdisp_frame *src, *dst; |
| struct vb2_v4l2_buffer *src_vb, *dst_vb; |
| int ret; |
| |
| src = &ctx->src; |
| dst = &ctx->dst; |
| |
| src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx); |
| ret = bdisp_get_addr(ctx, &src_vb->vb2_buf, src, src->paddr); |
| if (ret) |
| return ret; |
| |
| dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); |
| ret = bdisp_get_addr(ctx, &dst_vb->vb2_buf, dst, dst->paddr); |
| if (ret) |
| return ret; |
| |
| dst_vb->timestamp = src_vb->timestamp; |
| |
| return 0; |
| } |
| |
| static void bdisp_device_run(void *priv) |
| { |
| struct bdisp_ctx *ctx = priv; |
| struct bdisp_dev *bdisp; |
| unsigned long flags; |
| int err = 0; |
| |
| if (WARN(!ctx, "Null hardware context\n")) |
| return; |
| |
| bdisp = ctx->bdisp_dev; |
| dev_dbg(bdisp->dev, "%s\n", __func__); |
| spin_lock_irqsave(&bdisp->slock, flags); |
| |
| if (bdisp->m2m.ctx != ctx) { |
| dev_dbg(bdisp->dev, "ctx updated: %p -> %p\n", |
| bdisp->m2m.ctx, ctx); |
| ctx->state |= BDISP_PARAMS; |
| bdisp->m2m.ctx = ctx; |
| } |
| |
| if (ctx->state & BDISP_CTX_STOP_REQ) { |
| ctx->state &= ~BDISP_CTX_STOP_REQ; |
| ctx->state |= BDISP_CTX_ABORT; |
| wake_up(&bdisp->irq_queue); |
| goto out; |
| } |
| |
| err = bdisp_get_bufs(ctx); |
| if (err) { |
| dev_err(bdisp->dev, "cannot get address\n"); |
| goto out; |
| } |
| |
| bdisp_dbg_perf_begin(bdisp); |
| |
| err = bdisp_hw_reset(bdisp); |
| if (err) { |
| dev_err(bdisp->dev, "could not get HW ready\n"); |
| goto out; |
| } |
| |
| err = bdisp_hw_update(ctx); |
| if (err) { |
| dev_err(bdisp->dev, "could not send HW request\n"); |
| goto out; |
| } |
| |
| queue_delayed_work(bdisp->work_queue, &bdisp->timeout_work, |
| BDISP_WORK_TIMEOUT); |
| set_bit(ST_M2M_RUNNING, &bdisp->state); |
| out: |
| ctx->state &= ~BDISP_PARAMS; |
| spin_unlock_irqrestore(&bdisp->slock, flags); |
| if (err) |
| bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR); |
| } |
| |
| static struct v4l2_m2m_ops bdisp_m2m_ops = { |
| .device_run = bdisp_device_run, |
| .job_abort = bdisp_job_abort, |
| }; |
| |
| static int __bdisp_s_ctrl(struct bdisp_ctx *ctx, struct v4l2_ctrl *ctrl) |
| { |
| if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) |
| return 0; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_HFLIP: |
| ctx->hflip = ctrl->val; |
| break; |
| case V4L2_CID_VFLIP: |
| ctx->vflip = ctrl->val; |
| break; |
| default: |
| dev_err(ctx->bdisp_dev->dev, "unknown control %d\n", ctrl->id); |
| return -EINVAL; |
| } |
| |
| ctx->state |= BDISP_PARAMS; |
| |
| return 0; |
| } |
| |
| static int bdisp_s_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct bdisp_ctx *ctx = container_of(ctrl->handler, struct bdisp_ctx, |
| ctrl_handler); |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&ctx->bdisp_dev->slock, flags); |
| ret = __bdisp_s_ctrl(ctx, ctrl); |
| spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags); |
| |
| return ret; |
| } |
| |
| static const struct v4l2_ctrl_ops bdisp_c_ops = { |
| .s_ctrl = bdisp_s_ctrl, |
| }; |
| |
| static int bdisp_ctrls_create(struct bdisp_ctx *ctx) |
| { |
| if (ctx->ctrls_rdy) |
| return 0; |
| |
| v4l2_ctrl_handler_init(&ctx->ctrl_handler, BDISP_MAX_CTRL_NUM); |
| |
| ctx->bdisp_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler, |
| &bdisp_c_ops, V4L2_CID_HFLIP, 0, 1, 1, 0); |
| ctx->bdisp_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler, |
| &bdisp_c_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); |
| |
| if (ctx->ctrl_handler.error) { |
| int err = ctx->ctrl_handler.error; |
| |
| v4l2_ctrl_handler_free(&ctx->ctrl_handler); |
| return err; |
| } |
| |
| ctx->ctrls_rdy = true; |
| |
| return 0; |
| } |
| |
| static void bdisp_ctrls_delete(struct bdisp_ctx *ctx) |
| { |
| if (ctx->ctrls_rdy) { |
| v4l2_ctrl_handler_free(&ctx->ctrl_handler); |
| ctx->ctrls_rdy = false; |
| } |
| } |
| |
| static int bdisp_queue_setup(struct vb2_queue *vq, |
| const void *parg, |
| unsigned int *nb_buf, unsigned int *nb_planes, |
| unsigned int sizes[], void *allocators[]) |
| { |
| const struct v4l2_format *fmt = parg; |
| struct bdisp_ctx *ctx = vb2_get_drv_priv(vq); |
| struct bdisp_frame *frame = ctx_get_frame(ctx, vq->type); |
| |
| if (IS_ERR(frame)) { |
| dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame); |
| return PTR_ERR(frame); |
| } |
| |
| if (!frame->fmt) { |
| dev_err(ctx->bdisp_dev->dev, "Invalid format\n"); |
| return -EINVAL; |
| } |
| |
| if (fmt && fmt->fmt.pix.sizeimage < frame->sizeimage) |
| return -EINVAL; |
| |
| *nb_planes = 1; |
| sizes[0] = fmt ? fmt->fmt.pix.sizeimage : frame->sizeimage; |
| allocators[0] = ctx->bdisp_dev->alloc_ctx; |
| |
| return 0; |
| } |
| |
| static int bdisp_buf_prepare(struct vb2_buffer *vb) |
| { |
| struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
| struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type); |
| |
| if (IS_ERR(frame)) { |
| dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame); |
| return PTR_ERR(frame); |
| } |
| |
| if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| vb2_set_plane_payload(vb, 0, frame->sizeimage); |
| |
| return 0; |
| } |
| |
| static void bdisp_buf_queue(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
| |
| /* return to V4L2 any 0-size buffer so it can be dequeued by user */ |
| if (!vb2_get_plane_payload(vb, 0)) { |
| dev_dbg(ctx->bdisp_dev->dev, "0 data buffer, skip it\n"); |
| vb2_buffer_done(vb, VB2_BUF_STATE_DONE); |
| return; |
| } |
| |
| if (ctx->fh.m2m_ctx) |
| v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf); |
| } |
| |
| static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count) |
| { |
| struct bdisp_ctx *ctx = q->drv_priv; |
| struct vb2_v4l2_buffer *buf; |
| int ret = pm_runtime_get_sync(ctx->bdisp_dev->dev); |
| |
| if (ret < 0) { |
| dev_err(ctx->bdisp_dev->dev, "failed to set runtime PM\n"); |
| |
| if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { |
| while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx))) |
| v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED); |
| } else { |
| while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx))) |
| v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED); |
| } |
| |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void bdisp_stop_streaming(struct vb2_queue *q) |
| { |
| struct bdisp_ctx *ctx = q->drv_priv; |
| |
| __bdisp_job_abort(ctx); |
| |
| pm_runtime_put(ctx->bdisp_dev->dev); |
| } |
| |
| static struct vb2_ops bdisp_qops = { |
| .queue_setup = bdisp_queue_setup, |
| .buf_prepare = bdisp_buf_prepare, |
| .buf_queue = bdisp_buf_queue, |
| .wait_prepare = vb2_ops_wait_prepare, |
| .wait_finish = vb2_ops_wait_finish, |
| .stop_streaming = bdisp_stop_streaming, |
| .start_streaming = bdisp_start_streaming, |
| }; |
| |
| static int queue_init(void *priv, |
| struct vb2_queue *src_vq, struct vb2_queue *dst_vq) |
| { |
| struct bdisp_ctx *ctx = priv; |
| int ret; |
| |
| memset(src_vq, 0, sizeof(*src_vq)); |
| src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
| src_vq->io_modes = VB2_MMAP | VB2_DMABUF; |
| src_vq->drv_priv = ctx; |
| src_vq->ops = &bdisp_qops; |
| src_vq->mem_ops = &vb2_dma_contig_memops; |
| src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); |
| src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; |
| src_vq->lock = &ctx->bdisp_dev->lock; |
| |
| ret = vb2_queue_init(src_vq); |
| if (ret) |
| return ret; |
| |
| memset(dst_vq, 0, sizeof(*dst_vq)); |
| dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| dst_vq->io_modes = VB2_MMAP | VB2_DMABUF; |
| dst_vq->drv_priv = ctx; |
| dst_vq->ops = &bdisp_qops; |
| dst_vq->mem_ops = &vb2_dma_contig_memops; |
| dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); |
| dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; |
| dst_vq->lock = &ctx->bdisp_dev->lock; |
| |
| return vb2_queue_init(dst_vq); |
| } |
| |
| static int bdisp_open(struct file *file) |
| { |
| struct bdisp_dev *bdisp = video_drvdata(file); |
| struct bdisp_ctx *ctx = NULL; |
| int ret; |
| |
| if (mutex_lock_interruptible(&bdisp->lock)) |
| return -ERESTARTSYS; |
| |
| /* Allocate memory for both context and node */ |
| ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
| if (!ctx) { |
| ret = -ENOMEM; |
| goto unlock; |
| } |
| ctx->bdisp_dev = bdisp; |
| |
| if (bdisp_hw_alloc_nodes(ctx)) { |
| dev_err(bdisp->dev, "no memory for nodes\n"); |
| ret = -ENOMEM; |
| goto mem_ctx; |
| } |
| |
| v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev); |
| |
| ret = bdisp_ctrls_create(ctx); |
| if (ret) { |
| dev_err(bdisp->dev, "Failed to create control\n"); |
| goto error_fh; |
| } |
| |
| /* Use separate control handler per file handle */ |
| ctx->fh.ctrl_handler = &ctx->ctrl_handler; |
| file->private_data = &ctx->fh; |
| v4l2_fh_add(&ctx->fh); |
| |
| /* Default format */ |
| ctx->src = bdisp_dflt_fmt; |
| ctx->dst = bdisp_dflt_fmt; |
| |
| /* Setup the device context for mem2mem mode. */ |
| ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx, |
| queue_init); |
| if (IS_ERR(ctx->fh.m2m_ctx)) { |
| dev_err(bdisp->dev, "Failed to initialize m2m context\n"); |
| ret = PTR_ERR(ctx->fh.m2m_ctx); |
| goto error_ctrls; |
| } |
| |
| bdisp->m2m.refcnt++; |
| set_bit(ST_M2M_OPEN, &bdisp->state); |
| |
| dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx); |
| |
| mutex_unlock(&bdisp->lock); |
| |
| return 0; |
| |
| error_ctrls: |
| bdisp_ctrls_delete(ctx); |
| error_fh: |
| v4l2_fh_del(&ctx->fh); |
| v4l2_fh_exit(&ctx->fh); |
| bdisp_hw_free_nodes(ctx); |
| mem_ctx: |
| kfree(ctx); |
| unlock: |
| mutex_unlock(&bdisp->lock); |
| |
| return ret; |
| } |
| |
| static int bdisp_release(struct file *file) |
| { |
| struct bdisp_ctx *ctx = fh_to_ctx(file->private_data); |
| struct bdisp_dev *bdisp = ctx->bdisp_dev; |
| |
| dev_dbg(bdisp->dev, "%s\n", __func__); |
| |
| if (mutex_lock_interruptible(&bdisp->lock)) |
| return -ERESTARTSYS; |
| |
| v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); |
| |
| bdisp_ctrls_delete(ctx); |
| |
| v4l2_fh_del(&ctx->fh); |
| v4l2_fh_exit(&ctx->fh); |
| |
| if (--bdisp->m2m.refcnt <= 0) |
| clear_bit(ST_M2M_OPEN, &bdisp->state); |
| |
| bdisp_hw_free_nodes(ctx); |
| |
| kfree(ctx); |
| |
| mutex_unlock(&bdisp->lock); |
| |
| return 0; |
| } |
| |
| static const struct v4l2_file_operations bdisp_fops = { |
| .owner = THIS_MODULE, |
| .open = bdisp_open, |
| .release = bdisp_release, |
| .poll = v4l2_m2m_fop_poll, |
| .unlocked_ioctl = video_ioctl2, |
| .mmap = v4l2_m2m_fop_mmap, |
| }; |
| |
| static int bdisp_querycap(struct file *file, void *fh, |
| struct v4l2_capability *cap) |
| { |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| struct bdisp_dev *bdisp = ctx->bdisp_dev; |
| |
| strlcpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver)); |
| strlcpy(cap->card, bdisp->pdev->name, sizeof(cap->card)); |
| snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s%d", |
| BDISP_NAME, bdisp->id); |
| |
| cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M; |
| |
| cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
| |
| return 0; |
| } |
| |
| static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f) |
| { |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| const struct bdisp_fmt *fmt; |
| |
| if (f->index >= ARRAY_SIZE(bdisp_formats)) |
| return -EINVAL; |
| |
| fmt = &bdisp_formats[f->index]; |
| |
| if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) && |
| (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) { |
| dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n"); |
| return -EINVAL; |
| } |
| f->pixelformat = fmt->pixelformat; |
| |
| return 0; |
| } |
| |
| static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f) |
| { |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| struct v4l2_pix_format *pix = &f->fmt.pix; |
| struct bdisp_frame *frame = ctx_get_frame(ctx, f->type); |
| |
| if (IS_ERR(frame)) { |
| dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame); |
| return PTR_ERR(frame); |
| } |
| |
| pix = &f->fmt.pix; |
| pix->width = frame->width; |
| pix->height = frame->height; |
| pix->pixelformat = frame->fmt->pixelformat; |
| pix->field = frame->field; |
| pix->bytesperline = frame->bytesperline; |
| pix->sizeimage = frame->sizeimage; |
| pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ? |
| frame->colorspace : bdisp_dflt_fmt.colorspace; |
| |
| return 0; |
| } |
| |
| static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f) |
| { |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| struct v4l2_pix_format *pix = &f->fmt.pix; |
| const struct bdisp_fmt *format; |
| u32 in_w, in_h; |
| |
| format = bdisp_find_fmt(pix->pixelformat); |
| if (!format) { |
| dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n", |
| pix->pixelformat); |
| return -EINVAL; |
| } |
| |
| /* YUV420P only supported for VIDEO_OUTPUT */ |
| if ((format->pixelformat == V4L2_PIX_FMT_YUV420) && |
| (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) { |
| dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n"); |
| return -EINVAL; |
| } |
| |
| /* Field (interlaced only supported on OUTPUT) */ |
| if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) || |
| (pix->field != V4L2_FIELD_INTERLACED)) |
| pix->field = V4L2_FIELD_NONE; |
| |
| /* Adjust width & height */ |
| in_w = pix->width; |
| in_h = pix->height; |
| v4l_bound_align_image(&pix->width, |
| BDISP_MIN_W, BDISP_MAX_W, |
| ffs(format->w_align) - 1, |
| &pix->height, |
| BDISP_MIN_H, BDISP_MAX_H, |
| ffs(format->h_align) - 1, |
| 0); |
| if ((pix->width != in_w) || (pix->height != in_h)) |
| dev_dbg(ctx->bdisp_dev->dev, |
| "%s size updated: %dx%d -> %dx%d\n", __func__, |
| in_w, in_h, pix->width, pix->height); |
| |
| pix->bytesperline = (pix->width * format->bpp_plane0) / 8; |
| pix->sizeimage = (pix->width * pix->height * format->bpp) / 8; |
| |
| if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| pix->colorspace = bdisp_dflt_fmt.colorspace; |
| |
| return 0; |
| } |
| |
| static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f) |
| { |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| struct vb2_queue *vq; |
| struct bdisp_frame *frame; |
| struct v4l2_pix_format *pix; |
| int ret; |
| u32 state; |
| |
| ret = bdisp_try_fmt(file, fh, f); |
| if (ret) { |
| dev_err(ctx->bdisp_dev->dev, "Cannot set format\n"); |
| return ret; |
| } |
| |
| vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); |
| if (vb2_is_streaming(vq)) { |
| dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type); |
| return -EBUSY; |
| } |
| |
| frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ? |
| &ctx->src : &ctx->dst; |
| pix = &f->fmt.pix; |
| frame->fmt = bdisp_find_fmt(pix->pixelformat); |
| if (!frame->fmt) { |
| dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n", |
| pix->pixelformat); |
| return -EINVAL; |
| } |
| |
| frame->width = pix->width; |
| frame->height = pix->height; |
| frame->bytesperline = pix->bytesperline; |
| frame->sizeimage = pix->sizeimage; |
| frame->field = pix->field; |
| if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
| frame->colorspace = pix->colorspace; |
| |
| frame->crop.width = frame->width; |
| frame->crop.height = frame->height; |
| frame->crop.left = 0; |
| frame->crop.top = 0; |
| |
| state = BDISP_PARAMS; |
| state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ? |
| BDISP_DST_FMT : BDISP_SRC_FMT; |
| bdisp_ctx_state_lock_set(state, ctx); |
| |
| return 0; |
| } |
| |
| static int bdisp_g_selection(struct file *file, void *fh, |
| struct v4l2_selection *s) |
| { |
| struct bdisp_frame *frame; |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| |
| frame = ctx_get_frame(ctx, s->type); |
| if (IS_ERR(frame)) { |
| dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame); |
| return PTR_ERR(frame); |
| } |
| |
| switch (s->type) { |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| switch (s->target) { |
| case V4L2_SEL_TGT_CROP: |
| /* cropped frame */ |
| s->r = frame->crop; |
| break; |
| case V4L2_SEL_TGT_CROP_DEFAULT: |
| case V4L2_SEL_TGT_CROP_BOUNDS: |
| /* complete frame */ |
| s->r.left = 0; |
| s->r.top = 0; |
| s->r.width = frame->width; |
| s->r.height = frame->height; |
| break; |
| default: |
| dev_err(ctx->bdisp_dev->dev, "Invalid target\n"); |
| return -EINVAL; |
| } |
| break; |
| |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
| switch (s->target) { |
| case V4L2_SEL_TGT_COMPOSE: |
| case V4L2_SEL_TGT_COMPOSE_PADDED: |
| /* composed (cropped) frame */ |
| s->r = frame->crop; |
| break; |
| case V4L2_SEL_TGT_COMPOSE_DEFAULT: |
| case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
| /* complete frame */ |
| s->r.left = 0; |
| s->r.top = 0; |
| s->r.width = frame->width; |
| s->r.height = frame->height; |
| break; |
| default: |
| dev_err(ctx->bdisp_dev->dev, "Invalid target\n"); |
| return -EINVAL; |
| } |
| break; |
| |
| default: |
| dev_err(ctx->bdisp_dev->dev, "Invalid type\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b) |
| { |
| /* Return 1 if a is enclosed in b, or 0 otherwise. */ |
| |
| if (a->left < b->left || a->top < b->top) |
| return 0; |
| |
| if (a->left + a->width > b->left + b->width) |
| return 0; |
| |
| if (a->top + a->height > b->top + b->height) |
| return 0; |
| |
| return 1; |
| } |
| |
| static int bdisp_s_selection(struct file *file, void *fh, |
| struct v4l2_selection *s) |
| { |
| struct bdisp_frame *frame; |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| struct v4l2_rect *in, out; |
| bool valid = false; |
| |
| if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) && |
| (s->target == V4L2_SEL_TGT_CROP)) |
| valid = true; |
| |
| if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && |
| (s->target == V4L2_SEL_TGT_COMPOSE)) |
| valid = true; |
| |
| if (!valid) { |
| dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n"); |
| return -EINVAL; |
| } |
| |
| frame = ctx_get_frame(ctx, s->type); |
| if (IS_ERR(frame)) { |
| dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame); |
| return PTR_ERR(frame); |
| } |
| |
| in = &s->r; |
| out = *in; |
| |
| /* Align and check origin */ |
| out.left = ALIGN(in->left, frame->fmt->w_align); |
| out.top = ALIGN(in->top, frame->fmt->h_align); |
| |
| if ((out.left < 0) || (out.left >= frame->width) || |
| (out.top < 0) || (out.top >= frame->height)) { |
| dev_err(ctx->bdisp_dev->dev, |
| "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n", |
| out.width, out.height, out.left, out.top, |
| frame->width, frame->height); |
| return -EINVAL; |
| } |
| |
| /* Align and check size */ |
| out.width = ALIGN(in->width, frame->fmt->w_align); |
| out.height = ALIGN(in->height, frame->fmt->w_align); |
| |
| if (((out.left + out.width) > frame->width) || |
| ((out.top + out.height) > frame->height)) { |
| dev_err(ctx->bdisp_dev->dev, |
| "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n", |
| out.width, out.height, out.left, out.top, |
| frame->width, frame->height); |
| return -EINVAL; |
| } |
| |
| /* Checks adjust constraints flags */ |
| if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in)) |
| return -ERANGE; |
| |
| if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out)) |
| return -ERANGE; |
| |
| if ((out.left != in->left) || (out.top != in->top) || |
| (out.width != in->width) || (out.height != in->height)) { |
| dev_dbg(ctx->bdisp_dev->dev, |
| "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n", |
| __func__, in->width, in->height, in->left, in->top, |
| out.width, out.height, out.left, out.top); |
| *in = out; |
| } |
| |
| frame->crop = out; |
| |
| bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx); |
| |
| return 0; |
| } |
| |
| static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type) |
| { |
| struct bdisp_ctx *ctx = fh_to_ctx(fh); |
| |
| if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) && |
| !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) { |
| dev_err(ctx->bdisp_dev->dev, "src not defined\n"); |
| return -EINVAL; |
| } |
| |
| if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) && |
| !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) { |
| dev_err(ctx->bdisp_dev->dev, "dst not defined\n"); |
| return -EINVAL; |
| } |
| |
| return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type); |
| } |
| |
| static const struct v4l2_ioctl_ops bdisp_ioctl_ops = { |
| .vidioc_querycap = bdisp_querycap, |
| .vidioc_enum_fmt_vid_cap = bdisp_enum_fmt, |
| .vidioc_enum_fmt_vid_out = bdisp_enum_fmt, |
| .vidioc_g_fmt_vid_cap = bdisp_g_fmt, |
| .vidioc_g_fmt_vid_out = bdisp_g_fmt, |
| .vidioc_try_fmt_vid_cap = bdisp_try_fmt, |
| .vidioc_try_fmt_vid_out = bdisp_try_fmt, |
| .vidioc_s_fmt_vid_cap = bdisp_s_fmt, |
| .vidioc_s_fmt_vid_out = bdisp_s_fmt, |
| .vidioc_g_selection = bdisp_g_selection, |
| .vidioc_s_selection = bdisp_s_selection, |
| .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs, |
| .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, |
| .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, |
| .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, |
| .vidioc_qbuf = v4l2_m2m_ioctl_qbuf, |
| .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, |
| .vidioc_streamon = bdisp_streamon, |
| .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, |
| .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| }; |
| |
| static int bdisp_register_device(struct bdisp_dev *bdisp) |
| { |
| int ret; |
| |
| if (!bdisp) |
| return -ENODEV; |
| |
| bdisp->vdev.fops = &bdisp_fops; |
| bdisp->vdev.ioctl_ops = &bdisp_ioctl_ops; |
| bdisp->vdev.release = video_device_release_empty; |
| bdisp->vdev.lock = &bdisp->lock; |
| bdisp->vdev.vfl_dir = VFL_DIR_M2M; |
| bdisp->vdev.v4l2_dev = &bdisp->v4l2_dev; |
| snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d", |
| BDISP_NAME, bdisp->id); |
| |
| video_set_drvdata(&bdisp->vdev, bdisp); |
| |
| bdisp->m2m.vdev = &bdisp->vdev; |
| bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops); |
| if (IS_ERR(bdisp->m2m.m2m_dev)) { |
| dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n"); |
| return PTR_ERR(bdisp->m2m.m2m_dev); |
| } |
| |
| ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1); |
| if (ret) { |
| dev_err(bdisp->dev, |
| "%s(): failed to register video device\n", __func__); |
| v4l2_m2m_release(bdisp->m2m.m2m_dev); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void bdisp_unregister_device(struct bdisp_dev *bdisp) |
| { |
| if (!bdisp) |
| return; |
| |
| if (bdisp->m2m.m2m_dev) |
| v4l2_m2m_release(bdisp->m2m.m2m_dev); |
| |
| video_unregister_device(bdisp->m2m.vdev); |
| } |
| |
| static irqreturn_t bdisp_irq_thread(int irq, void *priv) |
| { |
| struct bdisp_dev *bdisp = priv; |
| struct bdisp_ctx *ctx; |
| |
| spin_lock(&bdisp->slock); |
| |
| bdisp_dbg_perf_end(bdisp); |
| |
| cancel_delayed_work(&bdisp->timeout_work); |
| |
| if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state)) |
| goto isr_unlock; |
| |
| if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) { |
| set_bit(ST_M2M_SUSPENDED, &bdisp->state); |
| wake_up(&bdisp->irq_queue); |
| goto isr_unlock; |
| } |
| |
| ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev); |
| if (!ctx || !ctx->fh.m2m_ctx) |
| goto isr_unlock; |
| |
| spin_unlock(&bdisp->slock); |
| |
| bdisp_job_finish(ctx, VB2_BUF_STATE_DONE); |
| |
| if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) { |
| bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx); |
| wake_up(&bdisp->irq_queue); |
| } |
| |
| return IRQ_HANDLED; |
| |
| isr_unlock: |
| spin_unlock(&bdisp->slock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t bdisp_irq_handler(int irq, void *priv) |
| { |
| if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv)) |
| return IRQ_NONE; |
| else |
| return IRQ_WAKE_THREAD; |
| } |
| |
| static void bdisp_irq_timeout(struct work_struct *ptr) |
| { |
| struct delayed_work *twork = to_delayed_work(ptr); |
| struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev, |
| timeout_work); |
| struct bdisp_ctx *ctx; |
| |
| ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev); |
| |
| dev_err(ctx->bdisp_dev->dev, "Device work timeout\n"); |
| |
| spin_lock(&bdisp->slock); |
| clear_bit(ST_M2M_RUNNING, &bdisp->state); |
| spin_unlock(&bdisp->slock); |
| |
| bdisp_hw_reset(bdisp); |
| |
| bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR); |
| } |
| |
| static int bdisp_m2m_suspend(struct bdisp_dev *bdisp) |
| { |
| unsigned long flags; |
| int timeout; |
| |
| spin_lock_irqsave(&bdisp->slock, flags); |
| if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) { |
| spin_unlock_irqrestore(&bdisp->slock, flags); |
| return 0; |
| } |
| clear_bit(ST_M2M_SUSPENDED, &bdisp->state); |
| set_bit(ST_M2M_SUSPENDING, &bdisp->state); |
| spin_unlock_irqrestore(&bdisp->slock, flags); |
| |
| timeout = wait_event_timeout(bdisp->irq_queue, |
| test_bit(ST_M2M_SUSPENDED, &bdisp->state), |
| BDISP_WORK_TIMEOUT); |
| |
| clear_bit(ST_M2M_SUSPENDING, &bdisp->state); |
| |
| if (!timeout) { |
| dev_err(bdisp->dev, "%s IRQ timeout\n", __func__); |
| return -EAGAIN; |
| } |
| |
| return 0; |
| } |
| |
| static int bdisp_m2m_resume(struct bdisp_dev *bdisp) |
| { |
| struct bdisp_ctx *ctx; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&bdisp->slock, flags); |
| ctx = bdisp->m2m.ctx; |
| bdisp->m2m.ctx = NULL; |
| spin_unlock_irqrestore(&bdisp->slock, flags); |
| |
| if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state)) |
| bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR); |
| |
| return 0; |
| } |
| |
| static int bdisp_runtime_resume(struct device *dev) |
| { |
| struct bdisp_dev *bdisp = dev_get_drvdata(dev); |
| int ret = clk_enable(bdisp->clock); |
| |
| if (ret) |
| return ret; |
| |
| return bdisp_m2m_resume(bdisp); |
| } |
| |
| static int bdisp_runtime_suspend(struct device *dev) |
| { |
| struct bdisp_dev *bdisp = dev_get_drvdata(dev); |
| int ret = bdisp_m2m_suspend(bdisp); |
| |
| if (!ret) |
| clk_disable(bdisp->clock); |
| |
| return ret; |
| } |
| |
| static int bdisp_resume(struct device *dev) |
| { |
| struct bdisp_dev *bdisp = dev_get_drvdata(dev); |
| unsigned long flags; |
| int opened; |
| |
| spin_lock_irqsave(&bdisp->slock, flags); |
| opened = test_bit(ST_M2M_OPEN, &bdisp->state); |
| spin_unlock_irqrestore(&bdisp->slock, flags); |
| |
| if (!opened) |
| return 0; |
| |
| if (!pm_runtime_suspended(dev)) |
| return bdisp_runtime_resume(dev); |
| |
| return 0; |
| } |
| |
| static int bdisp_suspend(struct device *dev) |
| { |
| if (!pm_runtime_suspended(dev)) |
| return bdisp_runtime_suspend(dev); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops bdisp_pm_ops = { |
| .suspend = bdisp_suspend, |
| .resume = bdisp_resume, |
| .runtime_suspend = bdisp_runtime_suspend, |
| .runtime_resume = bdisp_runtime_resume, |
| }; |
| |
| static int bdisp_remove(struct platform_device *pdev) |
| { |
| struct bdisp_dev *bdisp = platform_get_drvdata(pdev); |
| |
| bdisp_unregister_device(bdisp); |
| |
| bdisp_hw_free_filters(bdisp->dev); |
| |
| vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx); |
| |
| pm_runtime_disable(&pdev->dev); |
| |
| bdisp_debugfs_remove(bdisp); |
| |
| v4l2_device_unregister(&bdisp->v4l2_dev); |
| |
| if (!IS_ERR(bdisp->clock)) |
| clk_unprepare(bdisp->clock); |
| |
| dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name); |
| |
| return 0; |
| } |
| |
| static int bdisp_probe(struct platform_device *pdev) |
| { |
| struct bdisp_dev *bdisp; |
| struct resource *res; |
| struct device *dev = &pdev->dev; |
| int ret; |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL); |
| if (!bdisp) |
| return -ENOMEM; |
| |
| bdisp->pdev = pdev; |
| bdisp->dev = dev; |
| platform_set_drvdata(pdev, bdisp); |
| |
| if (dev->of_node) |
| bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME); |
| else |
| bdisp->id = pdev->id; |
| |
| init_waitqueue_head(&bdisp->irq_queue); |
| INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout); |
| bdisp->work_queue = create_workqueue(BDISP_NAME); |
| |
| spin_lock_init(&bdisp->slock); |
| mutex_init(&bdisp->lock); |
| |
| /* get resources */ |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| bdisp->regs = devm_ioremap_resource(dev, res); |
| if (IS_ERR(bdisp->regs)) { |
| dev_err(dev, "failed to get regs\n"); |
| return PTR_ERR(bdisp->regs); |
| } |
| |
| bdisp->clock = devm_clk_get(dev, BDISP_NAME); |
| if (IS_ERR(bdisp->clock)) { |
| dev_err(dev, "failed to get clock\n"); |
| return PTR_ERR(bdisp->clock); |
| } |
| |
| ret = clk_prepare(bdisp->clock); |
| if (ret < 0) { |
| dev_err(dev, "clock prepare failed\n"); |
| bdisp->clock = ERR_PTR(-EINVAL); |
| return ret; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| if (!res) { |
| dev_err(dev, "failed to get IRQ resource\n"); |
| goto err_clk; |
| } |
| |
| ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler, |
| bdisp_irq_thread, IRQF_ONESHOT, |
| pdev->name, bdisp); |
| if (ret) { |
| dev_err(dev, "failed to install irq\n"); |
| goto err_clk; |
| } |
| |
| /* v4l2 register */ |
| ret = v4l2_device_register(dev, &bdisp->v4l2_dev); |
| if (ret) { |
| dev_err(dev, "failed to register\n"); |
| goto err_clk; |
| } |
| |
| /* Debug */ |
| ret = bdisp_debugfs_create(bdisp); |
| if (ret) { |
| dev_err(dev, "failed to create debugfs\n"); |
| goto err_v4l2; |
| } |
| |
| /* Power management */ |
| pm_runtime_enable(dev); |
| ret = pm_runtime_get_sync(dev); |
| if (ret < 0) { |
| dev_err(dev, "failed to set PM\n"); |
| goto err_dbg; |
| } |
| |
| /* Continuous memory allocator */ |
| bdisp->alloc_ctx = vb2_dma_contig_init_ctx(dev); |
| if (IS_ERR(bdisp->alloc_ctx)) { |
| ret = PTR_ERR(bdisp->alloc_ctx); |
| goto err_pm; |
| } |
| |
| /* Filters */ |
| if (bdisp_hw_alloc_filters(bdisp->dev)) { |
| dev_err(bdisp->dev, "no memory for filters\n"); |
| ret = -ENOMEM; |
| goto err_vb2_dma; |
| } |
| |
| /* Register */ |
| ret = bdisp_register_device(bdisp); |
| if (ret) { |
| dev_err(dev, "failed to register\n"); |
| goto err_filter; |
| } |
| |
| dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME, |
| bdisp->id, bdisp->vdev.num); |
| |
| pm_runtime_put(dev); |
| |
| return 0; |
| |
| err_filter: |
| bdisp_hw_free_filters(bdisp->dev); |
| err_vb2_dma: |
| vb2_dma_contig_cleanup_ctx(bdisp->alloc_ctx); |
| err_pm: |
| pm_runtime_put(dev); |
| err_dbg: |
| bdisp_debugfs_remove(bdisp); |
| err_v4l2: |
| v4l2_device_unregister(&bdisp->v4l2_dev); |
| err_clk: |
| if (!IS_ERR(bdisp->clock)) |
| clk_unprepare(bdisp->clock); |
| |
| return ret; |
| } |
| |
| static const struct of_device_id bdisp_match_types[] = { |
| { |
| .compatible = "st,stih407-bdisp", |
| }, |
| { /* end node */ } |
| }; |
| |
| MODULE_DEVICE_TABLE(of, bdisp_match_types); |
| |
| static struct platform_driver bdisp_driver = { |
| .probe = bdisp_probe, |
| .remove = bdisp_remove, |
| .driver = { |
| .name = BDISP_NAME, |
| .of_match_table = bdisp_match_types, |
| .pm = &bdisp_pm_ops, |
| }, |
| }; |
| |
| module_platform_driver(bdisp_driver); |
| |
| MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC"); |
| MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>"); |
| MODULE_LICENSE("GPL"); |